The air in a closed organ pipe vibrates as shown. The length of the pipe is 3.0 m. The Li ency of vibration is 80 Hz. The speed of sound in the pipe is approximately

A) 80 m/s

B) 0.16 km/s

C) 0.24 km/s

D) 0.32 km/s

E) 0.96 km/s

The standing waves in air in a pipe of length L that is open at both ends have a speed v. The frequencies of the three lowest harmonics are

A) v/L, 2v/L, and 3v/L

B) v/2L, v/L, and 3v/2L

D) L/v, 2L/v, and 3L/v

E) ?/3, 2?/3, and 3?/3